Cool and Hot Components of a Coronal Bright Point

Details Cool and Hot Components of a Coronal Bright Point Cool and Hot Components of a Coronal Bright Point

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008espm...122.113t&link_type=abstract

"12th European Solar Physics Meeting, Freiburg, Germany, held September, 8-12, 2008. Online at http://espm.kis.uni-freiburg.de/,

Physics

Scientific paper

We performed a systematic study of the Doppler shifts and electron densities measured in an EUV bright point (hereafter BP) observed in more than 10 EUV lines with formation temperatures from log(T=K) = 4.5 to 6.3. Those parts of a BP seen in transition region and coronal lines are defined as its cool and hot components, respectively. We find that the transition from cool to hot occurs at a temperature around log(T=K) = 5.7. The two components of the BP reveal a totally different orientation and Doppler-shift pattern, which might result from a twist of the associated magnetic loop system. The analysis of magnetic-field evolution and topology seems to favour a two-stage heating process, in which magnetic cancelation and separator reconnection are powering, respectively, the cool and hot components of the BP. We also found that the electron densities of both components of the BP are higher than those of the surrounding quiet Sun, and comparable to or smaller than active-region densities.

Affiliated with

Also associated with

No associations

Rating

Cool and Hot Components of a Coronal Bright Point does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Cool and Hot Components of a Coronal Bright Point, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cool and Hot Components of a Coronal Bright Point will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1796441